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Bug 2048521 - CentOS 9 Stream: boot hangs with avc: denied when using a LUKS encrypted filesystem
Summary: CentOS 9 Stream: boot hangs with avc: denied when using a LUKS encrypted file...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: selinux-policy
Version: CentOS Stream
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: 9.0
Assignee: Zdenek Pytela
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-01-31 12:38 UTC by Stefan Krüger
Modified: 2022-05-17 16:12 UTC (History)
5 users (show)

Fixed In Version: selinux-policy-34.1.23-1.el9
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2022-05-17 15:50:10 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Bugzilla 1999526 1 None None None 2022-01-31 13:06:47 UTC
Red Hat Issue Tracker RHELPLAN-110394 0 None None None 2022-01-31 12:40:32 UTC
Red Hat Product Errata RHBA-2022:3918 0 None None None 2022-05-17 15:50:18 UTC

Description Stefan Krüger 2022-01-31 12:38:17 UTC 
Description of problem:

I can't insert the password for my LUKS encrypted /home, it just hangs on the serial console with the following messages:

[  OK  ] Found device /dev/cs/home.
         Starting Cryptography Setup for home...
[   10.360447] audit: type=1400 audit(1643631406.972:4): avc:  denied  { watch watch_reads } for  pid=771 comm="systemd-tty-ask" path="/dev/tty1" dev="devtmpfs" ino=20 scontext=system_u:system_r:systemd_passwd_agent_t:s0 tcontext=system_u:object_r:tty_device_t:s0 tclass=chr_file permissive=0
[   10.380787] audit: type=1400 audit(1643631406.985:5): avc:  denied  { watch watch_reads } for  pid=772 comm="systemd-tty-ask" path="/dev/ttyS0" dev="devtmpfs" ino=90 scontext=system_u:system_r:systemd_passwd_agent_t:s0 tcontext=system_u:object_r:tty_device_t:s0 tclass=chr_file permissive=0

Version-Release number of selected component (if applicable):

CentOS 9 Stream as of 2022-01-31

How reproducible:

Happens every time.

Steps to Reproduce:
1. Encrypt the /home filesystem with LUKS:

cryptsetup luksFormat /dev/mapper/cs-home
cryptsetup luksOpen /dev/mapper/cs-home crypthome
mkfs.xfs /dev/mapper/crypthome
echo 'crypthome /dev/cs/home' >> /etc/crypttab
echo '/dev/mapper/crypthome /home xfs defaults 0 0' >> /etc/fstab
systemctl reboot

Actual results:

see description

Expected results:

Being able to type the LUKS passphrase

Additional info:
Comment 1 Stefan Krüger 2022-01-31 13:00:55 UTC 
SELinux Version:

selinux-policy-34.1.22-1.el9.noarch
selinux-policy-targeted-34.1.22-1.el9.noarch
Comment 2 Zdenek Pytela 2022-01-31 13:06:47 UTC 
Commit to backport:
commit a246a874d4c19e6cf5008cf5cf3c36475f6840f0
Author: Zdenek Pytela <zpytela>
Date:   Tue Sep 21 20:56:22 2021 +0200

    Allow scripts to enter LUKS password
Comment 8 Stefan Krüger 2022-03-21 19:55:06 UTC 
Booting with a LUKS encrypted /home works fine now. Thanks!
Comment 10 errata-xmlrpc 2022-05-17 15:50:10 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (new packages: selinux-policy), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:3918
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